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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-10-06 12:35:35 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-10-10 10:32:28 -0300 |
| commit | 5355f9ca7b10183ce06e8a18003ba30f43774858 (patch) | |
| tree | f32e7d1293eb1eaa33267bfe0faed90b67eb990f /elf | |
| parent | c15318bfc5499d835c434a4d98b688aa2d928412 (diff) | |
| download | glibc-5355f9ca7b10183ce06e8a18003ba30f43774858.zip glibc-5355f9ca7b10183ce06e8a18003ba30f43774858.tar.gz glibc-5355f9ca7b10183ce06e8a18003ba30f43774858.tar.bz2 | |
elf: Remove -fno-tree-loop-distribute-patterns usage on dl-support
Besides the option being gcc specific, this approach is still fragile
and not future proof since we do not know if this will be the only
optimization option gcc will add that transforms loops to memset
(or any libcall).
This patch adds a new header, dl-symbol-redir-ifunc.h, that can b
used to redirect the compiler generated libcalls to port the generic
memset implementation if required.
Checked on x86_64-linux-gnu and aarch64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/Makefile | 5 | ||||
| -rw-r--r-- | elf/dl-support.c | 1 |
2 files changed, 1 insertions, 5 deletions
diff --git a/elf/Makefile b/elf/Makefile index 276343a..7b50ccc 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -162,11 +162,6 @@ ifeq (yes,$(have-loop-to-function)) CFLAGS-rtld.c += -fno-tree-loop-distribute-patterns endif -ifeq (yes,$(have-loop-to-function)) -# Likewise, during static library startup, memset is not yet available. -CFLAGS-dl-support.c = -fno-tree-loop-distribute-patterns -endif - # Compile rtld itself without stack protection. # Also compile all routines in the static library that are elided from # the shared libc because they are in libc.a in the same way. diff --git a/elf/dl-support.c b/elf/dl-support.c index 4af0b5b..614b5b3 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -44,6 +44,7 @@ #include <dl-auxv.h> #include <dl-find_object.h> #include <array_length.h> +#include <dl-symbol-redir-ifunc.h> extern char *__progname; char **_dl_argv = &__progname; /* This is checked for some error messages. */ |